1. American Cleft Palate-Craniofacial Association (2009) Parameters for the evaluation and treatment of patients with cleft lip/palate or other craniofacial anomalies. www.acpa-cpf.org/teamcare/ . Accessed 10 Nov 2011
2. American Speech-Language-Hearing Association (2003) Evidence-based practice: practice guidelines http//:professional.asha.og/communityslp/evidence_guidelines.cfm . Accessed 10 Nov 2011
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4. Berkowitz S (2004) Timing of cleft palate closure should be based on the ratio of the area of the cleft to that of the palatal segments and not on age alone: Chap. 17. In: Berkowitz S (ed) Cleft lip and palate: diagnosis and management, 2nd edn. Springer, Berlin/Heidelberg
5. Blijdorp P, Muller H (1984) The influence of the age at which the palate is closed on speech in the adult cleft palate patient. J Maxillofac Surg 12:239–246